Internal drum exposure system for reprographic machines, has beam comb of separate beams to expose sensitive material

摘要

Light from laser diodes (38) is transmitted in optical fibres (26), their ends terminating in a holder (24). The separate beams are directed to a tilting mirror (40) through a lens (30), and onto a rotating double sided mirror (32) driven by a motor (22). Subsequently the light passes to a semicircular trough (20). The holder, motor, and optical system move along the axis (18) of the trough so that the beam comb sweeps across the material covering the trough surface